Crushing-rolls



(No M odel.) 4 SheetsSheet 1.

' D. BRENNAN, Jr.

GRUSHING ROLLS.

No. 442,764. Patented Dec. 16. 1890.

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ORUSHING ROLLS. No. 442,764. Patented Dec. 16. 1890.

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(No Model.) 4 Sheets-Sheet 3. D. BRENNAN, Jr. GRUSHING ROLLS No. 442,764. Patented Dec'. 16. 1890.

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GRUSHING ROLLS.

No. 442,764. Patented Dec. 16. 1890.

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DANIEL BRENNAN, JR, OF BAYONNE, NEW JERSEY.

CRUSHING-ROLLS.

SPECIFICATION forming part of Letters Patent No. 442,764, dated December 16, 1890.

Application filed April 10, 1890.

To all whom it may concern:

Be it known that I, DANIEL BRENNAN, Jr.,

of Bayonne, in the county of Hudson and State of New Jersey, have invented a new and useful Improvementin Crushing-Rolls, of which the following is a full, clear, and exact description. The invention relates to that class of crush- 1n g-rolls in which the pressure is regulated in accordance with the material to be acted upon, and 1n which provision is made for allowing the rolls to yield and pass any foreign matter or material that they may be unable to crush, thus preventing injury to the machinery.

The object of my invention is to improve crushing-rolls of this character in their se veral features with a view of promoting economy, increasing the eiiiciency of the rolls, and rendering their action more reliable.

ltll'it view of giving a full understanding of the present improvements, it is explained that 111 machinery of this class-in crushing iron ores, for instancemany tons pressure is exerted on the rolls to keep them to their work, and it will be readily understood that in operation therolls willbe givenavibratory or jarring movement by reason of thehigh yieldi ng pressure and the resistance of the material being treated. Thus when weighted levers are employed, they and their appurtenances have communicated to them the vibratory movement of the rolls and pillow-blocks, and it is very evldentthat the vibrations thus imparted to the weighted lever will affect the constancy of its pressure, and thus impair its efficiency. A further objection to the weighted lever is that should any matter that the rolls are unable to crush accidentally enter between the latter-as, for instance, a drill-point or other piece of manufactured ironthe rate of speed of the rolls is such as to feed in the said bar before the resistance of the same to the rolls can overcome the inertia of the weighted lever to allow the movable roll to yield, and damage to the machinery is therefore liable to result. hen springs are employed alone to effect the pressure, their action is not sufficiently constant to be reliable, as their tension varies from many causes.

To the end therefore of overcoming the above and other practical difficulties, my invention consists in the novel construction Serial No. (M7337. (No model.)

hereinafter described, and defined in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 represents in perspective a pair of crushing-rolls and their appurtenances to which my improvements have been applied. Fig. 2 is a side elevation thereof. Fig. 3 is a front elevation, the handle-bar of the adj ustable stop being omitted to give a clear view of the tackle. Fig. i is a plan view. Fig. 5 is a side view of one of the improved sheaves forming a feature of my invention. Fig. 6 is a vertical sectional elevation of such sheave, the View being taken on the line (5 (5, Fig. 5. Fig. 7 is a sectional plan view, the section being taken on the line 7 7 of Fig. 3. Fig. 8 is a longitudinal sectional elevation on line 8 8 of Fig. 4, looking in the direction of the arrows shown in connection with said Fig. 4; and Fig. 9 is a detail view of the head of the adjustable stop.

The crushing-rolls A A have their trunnions act journaled, respectively, in the fixed pillow-blocks B and the movable pillowblocks B.

The pillowblocks are mounted on hollow beds 0, and are formed with side flanges B 13 which straddle said beds 0, and by means of which the said pillow-blocks are held to their beds through the medium of bolts D D D, one of which bolts D and the bolt D are made to serve as the pins on which the sheaves E E of the tackle are mounted, the said sheaves being arranged within the hollow beds 0, whereby they are protected from dirt and injury. Each pair of pillow-blocks are united by transverse bolts B A wire rope or othersuitable rope, band, or chain F is rove through the two sets of sheaves E E, one end of the rope being secured to a suitable fixed supportas, for instance, to the fixed pin D of the stationary sheaves E, as shown--and the fall or free end of the rope carries a rod G. On the lower end of the rod G a plate 9 is held and forms a seat for a spring 11, the upper end of Which abuts against a plate g, that is free to-move vertically on the rod G in response to the tension of the spring and the pressure of the removable weights I, by means of which weights I pressure is exerted on the movable crushingroll A through the spring H and rope or like connection F.

The pin D of each set of movable sheaves E moves in longitudinal slots 0, formed in the sides of the'hollow beds (J, (see Fig. 8,) and the said pin D being fixedly held to the pillow-block B, the weights I will tend to maintain the roll A of said movable pillowblocks up to its work in connection with the relatively-fixed roll A.

In order to limit the movement of the roll A toward the stationaryroll A in accordance with the degree of fineness to which the material being operated upon is to be reduced, I provide adjustable stops J. Each stop J extends longitudinally of the fixed pillow-blocks through a passage b, formedin the inner side of said blocks, through an aperture or opening bin the front of the blocks, and through a suitable guide-opening formed in an intermediate vertical lug or projection b Adjacent to the projection b at the inner side thereof the bottom of the pillow-block B is formed with a recess or opening b which accommodates and holds in place a nut J, through which the threaded portion j of the adjustable stop J passes, whereby when the said stop is turned by means of the handlebar J or by a wrench the inner end of the said stop is projected the desired extent beyond the inner face of the fixed pillow-block to limit the forward movement of the movable pillow-block. The handle-bar J 2 is fitted in one of the intersecting apertures 7", formed in the outer end of the stop J, and may be moved in said aperture to enable the bar to clear a suitable stop 7' in turning the stop J. The stop j may consistof anysuitable block, bolt, or other device fixed in such position as to cause it to engage the handle-bar J 2 to prevent the latter from accidentally turning.

The inner end of the stop J is provided with a squared head J as shown most clearly in Figs. 1 and 9, the head being fitted on the reduced end 9' of the stop and held in place bya bolt or screw 3', which is secured axially in the end of the stop J. The heads J rest on the tops of the beds, whereby, the said heads will be prevented. from turning with the stops while being free to respond to the longitudinal movements of the latter. The stop J is also required to be adjustable to adapt it to the gradual decrease of the diameter of the rolls by the abrasion of the material operated upon.

The pi'llow-blocks are all formed in the main "of corresponding construction with a view to promoting economy in their manufacture. The movable pillow-blocks have each, therefore, an opening 1) corresponding to the openingsb in the stationaryblocks, and in the former said openings are directly in line with the stops J. As the stops are of less diameter than the openings, the thrust of the movable blocks is received by the heads J 3 of the stops, by reason of which the effect of the shock is more or less spent on the head, and the strain on the stop-bar and its threads is therefore less than if the thrust were received directly by the bar J. The heads J it will be observed, are formed of comparatively thin metal.

The bearings of the several pillow-blocks are formed alike, and each consists of the semicircular hearings or half-boxes 1;, provided with the caps B The bearing-surface consists of any suitable lining of Babbitt or composition metal. The bottom of each cap B is seated on the projecting ledge b of the pillow-block, and is secured to the latter by screws 1), the shanks whereof pass through oblong slots 19 formed in the bottom of the cap. The upper end of the cap B is bolted to the vertically-extending upper end 12 of the blocks by a horizontal bolt b", which passes through a bolt-hole b in the cap. The boxes are, however, of ordinary form in the main. The caps B are filled with waste and supplied with oil through the hinged cover, the upturned lower ends I) of the caps serving to hold a supply of oil.

The sheet-metal housing or covering B of the pillow-blocksexcludes dirt and dust from the interior.

In the bottoms of the movable pillow-blocks a short vertical pipe 11 is fitted, which communicates with an orifice Z9 which leads to the joint between the cap and journal-box, whereby the contacting surfaces of the movable blocks and theirbeds will be lubricated by waste oil from said journal-box.

Referring particularly to Figs. 5 and 6, the sheaves of the tackle are formed of the two members 6 e, which are bolted or riveted together on a transversely-r011nded hub e, in the eye of which is formed a depression e for receiving a lubricant, a similar depression or recess a being formed in the body portion. Any other suitable provision may be made for lubricating the sheave. The sheaves by this construction are permitted to cant sidewise on their rounded hubs, and are therefore enabled to accommodate themselves to the lines of strain of the rope of the tackle, as will readily be understood,whereby the sheaves will be relieved of much lateral strain. Owing to the great strain exerted by the Weights this form of sheave, it is evident, is specially adapted for its purpose.

In practice sufficient clearance is allowed bet-ween the flanges of the movable pillowblocks and the sides of the hollow beds to allow the yielding roll to swing sufficiently out of line with the stationary roll in response to uneven feeding of the material or uneven wear 011 the rolls.

The above-described machine afiords a steady and uniform pressure for the rolls owing to the indirect application of the pressure, and, in addition, should a drill-point,

piece of steel, or other like unyielding article or material enter between the rolls the tension of the spring-cushion of the weights will be overcome to a sufficient extent to cause the spring to yield and allow the rolls to separate and pass the said d rill-point or other matter, whereas without the intervention of the spring-cushion the separation of the rolls might not occur quickly enough to avoid damage, as the unyielding matter would overcome the spring when it could not immediately overcome the inertia of the weights. I

The drawings showa drive-pulley L forimparting motion to the stationary roll A, the movable roll receiving its motion from the material. Any other suitable driving-gear may be employed.

The particular arrangementshown ismerely to illustrate the invention in the preferred form, and, described in its simplest form, it may be said to consist in applying the pressure to the yielding roll through the medium of a rope, chain, or the like connected with the said roll, led over a pulley or guide, and carrying weights at its free end or fall.

I prefer the construction shown, as a lighter or more flexible chain or rope can be used and less weightis needed; but the number of sheaves, strength of rope, and amount of weight may be varied, as desired, as will readily be understood by mechanics.

The housing of the sheaves within the hollow beds of the pillow-blocks I find a very desirable feature in practice.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combinatiomwith crushing-rolls and with the pillow-blocks of the yielding roll, of pulleys carried thereby, and ropes passing over said pulleys and provided with weights, substantially as described.

2. The combination, with crushing-rolls, of a tackle, one set of the sheaves of which is movable with the movable crushing roll, weights arranged in connection with the tackle, and a spring-cushion for said weights, substantially as described.

In crushing-rolls, the combination, with the movable rolls, of a tackle connected with the yielding roll and comprising sheaves movable obliquely to their hubs, a rope rovc through said sheaves, a spring-seat arranged for connection with the free end of said rope, and weights seated on said seat, substantially as described.

4. The combination, in crushing-rolls and with the pillowblocks of the yielding pressure-roll, a hollow supporting-bed therefor, and a means for exerting pressure on said roll, of a rope for transmitting the pressure to the roll, said rope extending from the pillow-block through the hollow bed to the pressure mechanism, substantially as described.

5. The combinatiom in crushing-rolls and with the pillow-blocks of the yielding pressure-roll and the hollow bed therefor, of a rope for transmitting pressure to the said roll and fixed and movable sets of sheaves arranged within the hollow bed and over which sheaves said rope passes, substantially as described.

6. The combination, in crushing-rolls and with the pillow-blocks of. the yielding roll, of weights for exerting pressure on said roll, a spring forming a seat for said weights, and a rope transmitting the pressure of the weight-s, substantially as described.

7. The combination, with crushing-rolls of the character described, of stops for. the yielding roll, consisting of screw-rods having at their inner ends loosely-fitted heads against which the pillow-blocks of the yielding roll contact, said heads being held to the rods for longitudinal movement therewith, but held against rotary movement, substantially as described.

8. The combination, with crushing-rolls of the character described, of stops consisting of screw-rods that pass through the pillowblocks of the stationary roll and disposed in the direction of the pillow-blocks of the yielding roll and formed with heads that rest on the bed of the rolls and support the inner free ends of the rods, substantially as described.

DANIEL BRENNAN, JR.

Witnesses:

J. L. MOAULIFFE, O. SEDGVVICK. 

